Railroad-brake.



No. 857,792. PATENTED JUNE 25, 19Q'7.

H. A. COLEMAN.

RAILROAD BRAKE.

APPLICATION FILED MAR. 4. 1907.

2 SHEETS-S EET 1.

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PATENTED JUNE 25, 1907.

H. A. COLEMAN.

RAILROAD BRAKE. APPLI'0ATIO'N FILED MAR. 4. 1907.

2 SHBETSSHEET 2.

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HOWARD A. COLEMAN, OF SANBORN, IOWA.

RAILROAD-BRAKE.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed March 4,1907- Serial No. 360,392-

To all whom it may concern.-

Be it known that I, HOWARD A. COLEMAN, a citizen of the United States, residing at Sanborn, in the county of OBrien, State of Iowa, have invented certain new and useful Improvements in Railroad-Brakes and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to electricallyoperated brakes for railway cars, and particularly for street railways.

It is the object of the invention to provide improvements that may be readily applied and operated with the utmost efliciency, ease and convenience in applying the brakes to stop or regulate the speed of the cars.

The nature of the invention may be ascertained from the device portrayed in the annexed drawings, forming a part of this specification, in view of which the said invention will first be described in detail with respect to its construction and mode of operation, and then be pointed out with particularity in the subjoined claim.

Of the said drawingsFigure 1 is a plan of a part of the running gear of a car, showing my improvements as applied thereto. Fig. 2 is a separate detail view in perspective, showing on enlarged scale one form of means that may be employed in carrying my improvements into effect. Fig. 3 is a similar view of a different form of means from that shown in Fig. 2, but operating in substantially the same way with the same effect.

Similar numerals of reference designate similar parts or features, as the case may be, wherever they occur.

In the drawings 10 designates the side rails of the frame of the running-gear of a car. 11 are two of the wheels and 12 their axle. 13 is the transverse brake-bar arranged to swing as usual and provided with brake-shoes 14 to be brought against the treads of the wheels to brake their movement, all as is common.

15 designates the rod that is connected with the brake-bar 13 to move it. The said rod extends longitudinally of the car and is connected with the crank-portion 16 of a crank-rod 17 that is arranged transversely of the car frame, and supported in bearings to permit it to turn axially so as to operate its crank to draw upon the'rod 15 and draw upon the brake-bar to apply the brake-shoes to the wheels to check or stop the car. When the pull on the. brake-rod is discontinued, the brake-shoes will fall away from the wheels by reason of the hanging support of the brake-bar, as is well understood.

The crank rod 15 is operated electrically to give a partial rotation thereto by means of electro magnets energized through the medium of a rheostat or other suitable means to control the current of electricity, said magnets being arranged to attract armatures supported on the crank-shaft to move concentrically with its axis, or with the opposing poles of other magnets supported on the crank-rod in the same way.

In Fig. 2 I have shown the crank-rod as provided at its opposite end portions with a wound electro magnet 18 with its opposite poles N. and S. extending therefrom in opposite directions. In near spaced relationship to the poles of the electro magnet 18 and at a distance circumferentially therefrom are the electrodes or poles of another magnet, the dissimilar poles of the two magnets being in near spaced relationship, as stated. The wires leading to and from the magnets will be properly insulated from the crank shaft and from each other and any parts with which they may come into contact as indicated.

It will now be seen that when the magnets are energized the poles of the magnet 18 will be attracted to the opposing poles of the other fixed magnet, and so operate the crank-shaft 17 rotatively, drawing on the brake-rod 15, applying the brakes to the wheels with a degree of energy desired, which may be controlled by the rheostat.

In Fig. 3 I have shown the crank-rod provided with radially arranged soft pieces of iron 19 in spaced relationship circumferentially and radially to electro magnets 20, so that when the latter are energized the soft iron pieces 19 will be attracted to the magnets 20, moving the crank rod 17 rotatively with the same effect as has been explained with respect to the form of means shown in Fig. 2.

What is claimed is: v

The combination, with the movable brakebar provided with brake-shoes normally held out of applied position with respect to the wheels, of a crank shaft, a rod connecting the crank of the crank-shaft with the brake bar, armatures radially supported on the crank shaft, and electro-magnets disposed in proximity to said armatures, whereby when said In testimony whereof, I aflix my signature, in presence 01 two Witnesses.

HOWARD A. COLEMAN.

WVitnesses W. A. SoLoN, MARY A. COLEMAN. 

